|
12 | 12 | #import "libbpg.h" |
13 | 13 | #endif |
14 | 14 |
|
| 15 | +#if defined(USE_X265) |
| 16 | +#import "bpgenc.h" |
| 17 | +#import <Accelerate/Accelerate.h> |
| 18 | +#endif |
| 19 | + |
15 | 20 | #define SD_FOUR_CC(c1,c2,c3,c4) ((uint32_t)(((c4) << 24) | ((c3) << 16) | ((c2) << 8) | (c1))) |
16 | 21 |
|
17 | 22 | static void FreeImageData(void *info, const void *data, size_t size) { |
18 | 23 | free((void *)data); |
19 | 24 | } |
20 | 25 |
|
| 26 | +#if defined(USE_X265) |
| 27 | +static int WriteImageData(void *opaque, const uint8_t *buf, int buf_len) { |
| 28 | + NSMutableData *imageData = (__bridge NSMutableData *)opaque; |
| 29 | + NSCParameterAssert(imageData); |
| 30 | + NSCParameterAssert(buf); |
| 31 | + |
| 32 | + [imageData appendBytes:buf length:buf_len]; |
| 33 | + return buf_len; |
| 34 | +} |
| 35 | + |
| 36 | +static void FillRGBABufferWithBPGImage(vImage_Buffer *red, vImage_Buffer *green, vImage_Buffer *blue, vImage_Buffer *alpha, BPGImage *img) { |
| 37 | + // libbpg RGB coder format order is GBR/GBRA |
| 38 | + red->width = img->w; |
| 39 | + red->height = img->h; |
| 40 | + red->data = img->data[2]; |
| 41 | + red->rowBytes = img->linesize[2]; |
| 42 | + |
| 43 | + green->width = img->w; |
| 44 | + green->height = img->h; |
| 45 | + green->data = img->data[0]; |
| 46 | + green->rowBytes = img->linesize[0]; |
| 47 | + |
| 48 | + blue->width = img->w; |
| 49 | + blue->height = img->h; |
| 50 | + blue->data = img->data[1]; |
| 51 | + blue->rowBytes = img->linesize[1]; |
| 52 | + |
| 53 | + if (img->has_alpha) { |
| 54 | + alpha->width = img->w; |
| 55 | + alpha->height = img->h; |
| 56 | + alpha->data = img->data[3]; |
| 57 | + alpha->rowBytes = img->linesize[3]; |
| 58 | + } |
| 59 | +} |
| 60 | +#endif |
| 61 | + |
21 | 62 | @implementation SDImageBPGCoder |
22 | 63 |
|
23 | 64 | + (instancetype)sharedCoder { |
@@ -128,12 +169,198 @@ - (UIImage *)decodedImageWithData:(NSData *)data options:(SDImageCoderOptions *) |
128 | 169 |
|
129 | 170 | #pragma mark - Encode |
130 | 171 | - (BOOL)canEncodeToFormat:(SDImageFormat)format { |
| 172 | + if (format == SDImageFormatBPG) { |
| 173 | +#if defined(USE_X265) |
| 174 | + return YES; |
| 175 | +#else |
| 176 | + return NO; |
| 177 | +#endif |
| 178 | + } |
131 | 179 | return NO; |
132 | 180 | } |
133 | 181 |
|
134 | 182 | - (NSData *)encodedDataWithImage:(UIImage *)image format:(SDImageFormat)format options:(SDImageCoderOptions *)options { |
| 183 | +#if defined(USE_X265) |
| 184 | + double compressionQuality = 1; |
| 185 | + if (options[SDImageCoderEncodeCompressionQuality]) { |
| 186 | + compressionQuality = [options[SDImageCoderEncodeCompressionQuality] doubleValue]; |
| 187 | + } |
| 188 | + BOOL encodeFirstFrame = [options[SDImageCoderEncodeFirstFrameOnly] boolValue]; |
| 189 | + |
| 190 | + return [self sd_encodedBPGDataWithImage:image quality:compressionQuality encodeFirstFrame:encodeFirstFrame]; |
| 191 | +#else |
135 | 192 | return nil; |
| 193 | +#endif |
| 194 | +} |
| 195 | + |
| 196 | +#if defined(USE_X265) |
| 197 | +- (nullable NSData *)sd_encodedBPGDataWithImage:(nonnull UIImage *)image quality:(double)quality encodeFirstFrame:(BOOL)encodeFirstFrame { |
| 198 | + BPGEncoderContext *enc_ctx; |
| 199 | + BPGEncoderParameters *p; |
| 200 | + p = bpg_encoder_param_alloc(); |
| 201 | + if (!p) { |
| 202 | + return nil; |
| 203 | + } |
| 204 | + // BPG quality is from [0-51], 0 means the best quality but the biggest size. But we define 1.0 the best qualiy, 0.0 the smallest size. |
| 205 | + if (quality == 1) { |
| 206 | + p->lossless = 1; |
| 207 | + } |
| 208 | + p->qp = (1 - quality) * 51; |
| 209 | + |
| 210 | + NSArray<SDImageFrame *> *frames = [SDImageCoderHelper framesFromAnimatedImage:image]; |
| 211 | + NSMutableData *mutableData = [NSMutableData data]; |
| 212 | + |
| 213 | + if (encodeFirstFrame || frames.count == 0) { |
| 214 | + // for static BPG image |
| 215 | + enc_ctx = bpg_encoder_open(p); |
| 216 | + if (!enc_ctx) { |
| 217 | + bpg_encoder_param_free(p); |
| 218 | + return nil; |
| 219 | + } |
| 220 | + |
| 221 | + BPGImage *img = [self sd_encodedBPGFrameWithImage:image]; |
| 222 | + if (!img) { |
| 223 | + bpg_encoder_close(enc_ctx); |
| 224 | + bpg_encoder_param_free(p); |
| 225 | + return nil; |
| 226 | + } |
| 227 | + bpg_encoder_encode(enc_ctx, img, WriteImageData, (__bridge void *)mutableData); |
| 228 | + bpg_image_free(img); |
| 229 | + } else { |
| 230 | + // for aniated BPG image |
| 231 | + p->animated = 1; |
| 232 | + |
| 233 | + enc_ctx = bpg_encoder_open(p); |
| 234 | + if (!enc_ctx) { |
| 235 | + bpg_encoder_param_free(p); |
| 236 | + return nil; |
| 237 | + } |
| 238 | + |
| 239 | + for (size_t i = 0; i < frames.count; i++) { |
| 240 | + @autoreleasepool { |
| 241 | + SDImageFrame *currentFrame = frames[i]; |
| 242 | + |
| 243 | + BPGImage *img = [self sd_encodedBPGFrameWithImage:currentFrame.image]; |
| 244 | + if (!img) { |
| 245 | + bpg_encoder_close(enc_ctx); |
| 246 | + bpg_encoder_param_free(p); |
| 247 | + return nil; |
| 248 | + } |
| 249 | + // libbpg calculate the frame duration like this: seconds = frame_delay_num / frame_delay_den * frame_ticks |
| 250 | + int frame_ticks = currentFrame.duration * p->frame_delay_den / p->frame_delay_num; |
| 251 | + bpg_encoder_set_frame_duration(enc_ctx, frame_ticks); |
| 252 | + bpg_encoder_encode(enc_ctx, img, WriteImageData, (__bridge void *)mutableData); |
| 253 | + bpg_image_free(img); |
| 254 | + } |
| 255 | + } |
| 256 | + // When encoding animations, img = NULL indicates the end of the stream |
| 257 | + bpg_encoder_encode(enc_ctx, NULL, WriteImageData, (__bridge void *)mutableData); |
| 258 | + } |
| 259 | + |
| 260 | + bpg_encoder_close(enc_ctx); |
| 261 | + bpg_encoder_param_free(p); |
| 262 | + |
| 263 | + |
| 264 | + return [mutableData copy]; |
| 265 | +} |
| 266 | + |
| 267 | + |
| 268 | +- (BPGImage *)sd_encodedBPGFrameWithImage:(nonnull UIImage *)image { |
| 269 | + CGImageRef imageRef = image.CGImage; |
| 270 | + if (!imageRef) { |
| 271 | + return nil; |
| 272 | + } |
| 273 | + |
| 274 | + BPGImageFormatEnum format = BPG_FORMAT_444; |
| 275 | + BPGColorSpaceEnum color_space = BPG_CS_RGB; |
| 276 | + |
| 277 | + size_t width = CGImageGetWidth(imageRef); |
| 278 | + size_t height = CGImageGetHeight(imageRef); |
| 279 | + size_t bytesPerRow = CGImageGetBytesPerRow(imageRef); |
| 280 | + size_t bitsPerPixel = CGImageGetBitsPerPixel(imageRef); |
| 281 | + size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef); |
| 282 | + CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef); |
| 283 | + CGImageAlphaInfo alphaInfo = bitmapInfo & kCGBitmapAlphaInfoMask; |
| 284 | + CGBitmapInfo byteOrderInfo = bitmapInfo & kCGBitmapByteOrderMask; |
| 285 | + BOOL hasAlpha = !(alphaInfo == kCGImageAlphaNone || |
| 286 | + alphaInfo == kCGImageAlphaNoneSkipFirst || |
| 287 | + alphaInfo == kCGImageAlphaNoneSkipLast); |
| 288 | + BOOL byteOrderNormal = NO; |
| 289 | + switch (byteOrderInfo) { |
| 290 | + case kCGBitmapByteOrderDefault: { |
| 291 | + byteOrderNormal = YES; |
| 292 | + } break; |
| 293 | + case kCGBitmapByteOrder32Little: { |
| 294 | + } break; |
| 295 | + case kCGBitmapByteOrder32Big: { |
| 296 | + byteOrderNormal = YES; |
| 297 | + } break; |
| 298 | + default: break; |
| 299 | + } |
| 300 | + |
| 301 | + // libbpg supports 4 Planr16 channel for RGBA (BPGImage->data[4], which actually store uint16_t not uint8_t) |
| 302 | + // Actually, we can optimize to use RGB888 and convert into Planr16. However, since vImage is fast on GPU, use the built-in method (vImageConvert_RGB16UtoPlanar16U) can boost encoding time. |
| 303 | + vImageConverterRef convertor = NULL; |
| 304 | + vImage_Error v_error = kvImageNoError; |
| 305 | + |
| 306 | + vImage_CGImageFormat srcFormat = { |
| 307 | + .bitsPerComponent = (uint32_t)bitsPerComponent, |
| 308 | + .bitsPerPixel = (uint32_t)bitsPerPixel, |
| 309 | + .colorSpace = CGImageGetColorSpace(imageRef), |
| 310 | + .bitmapInfo = bitmapInfo |
| 311 | + }; |
| 312 | + vImage_CGImageFormat destFormat = { |
| 313 | + .bitsPerComponent = 16, |
| 314 | + .bitsPerPixel = hasAlpha ? 64 : 48, |
| 315 | + .colorSpace = [SDImageCoderHelper colorSpaceGetDeviceRGB], |
| 316 | + .bitmapInfo = hasAlpha ? kCGImageAlphaFirst | kCGBitmapByteOrderDefault : kCGImageAlphaNone | kCGBitmapByteOrderDefault // RGB16U/ARGB16U (Non-premultiplied to works for libbpg) |
| 317 | + }; |
| 318 | + |
| 319 | + convertor = vImageConverter_CreateWithCGImageFormat(&srcFormat, &destFormat, NULL, kvImageNoFlags, &v_error); |
| 320 | + if (v_error != kvImageNoError) { |
| 321 | + return nil; |
| 322 | + } |
| 323 | + |
| 324 | + vImage_Buffer src; |
| 325 | + v_error = vImageBuffer_InitWithCGImage(&src, &srcFormat, NULL, imageRef, kvImageNoFlags); |
| 326 | + if (v_error != kvImageNoError) { |
| 327 | + return nil; |
| 328 | + } |
| 329 | + size_t destBytesPerRow = width * destFormat.bitsPerPixel / 8; |
| 330 | + vImage_Buffer dest; |
| 331 | + vImageBuffer_Init(&dest, height, width, hasAlpha ? 64 : 48, kvImageNoFlags); |
| 332 | + if (!dest.data) { |
| 333 | + free(src.data); |
| 334 | + return nil; |
| 335 | + } |
| 336 | + |
| 337 | + // Convert input color mode to RGB16U/ARGB16U |
| 338 | + v_error = vImageConvert_AnyToAny(convertor, &src, &dest, NULL, kvImageNoFlags); |
| 339 | + free(src.data); |
| 340 | + vImageConverter_Release(convertor); |
| 341 | + if (v_error != kvImageNoError) { |
| 342 | + free(dest.data); |
| 343 | + return nil; |
| 344 | + } |
| 345 | + |
| 346 | + BPGImage *img = bpg_image_alloc((int)width, (int)height, format, hasAlpha, color_space, (int)bitsPerComponent); |
| 347 | + |
| 348 | + vImage_Buffer red, green, blue, alpha; |
| 349 | + FillRGBABufferWithBPGImage(&red, &green, &blue, &alpha, img); |
| 350 | + |
| 351 | + if (hasAlpha) { |
| 352 | + v_error = vImageConvert_ARGB16UtoPlanar16U(&dest, &alpha, &red, &green, &blue, kvImageNoFlags); |
| 353 | + } else { |
| 354 | + v_error = vImageConvert_RGB16UtoPlanar16U(&dest, &red, &green, &blue, kvImageNoFlags); |
| 355 | + } |
| 356 | + free(dest.data); |
| 357 | + if (v_error != kvImageNoError) { |
| 358 | + return nil; |
| 359 | + } |
| 360 | + |
| 361 | + return img; |
136 | 362 | } |
| 363 | +#endif |
137 | 364 |
|
138 | 365 | // libbpg currently does not fully support progressive decoding (alpha-only and contains issue), this does not be compatible with `SDProgressiveImageCoder` protocol |
139 | 366 |
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